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Geography of Ottawa

From Wikipedia, the free encyclopedia

This is the outline of the geography of the city of Ottawa, the capital of Canada. Ottawa's current borders were formed in 2001, when the former city of Ottawa amalgamated with the ten other municipalities within the former Regional Municipality of Ottawa–Carleton. Ottawa is now a single-tiered census division, home to 1,017,449 people.[1]

National Capital Region by SPOT Satellite in 2003

The city centre is located at the confluence of the Ottawa and Rideau Rivers. The Ottawa River forms the entire northern boundary of the city which it shares with the province of Quebec's municipalities of Pontiac and Gatineau. The northern boundary begins in the west at Arnprior and continues east to Rockland. The boundary then turns south in a straight line, separating the former Township of Cumberland (now in Ottawa) and the City of Clarence-Rockland. It then turns west in another straight line separating the former Township of Cumberland with the municipalities of The Nation and Russell. It then turns south separating Russell from the former Township of Osgoode (now in Ottawa). That boundary runs south in a straight line, then turns west separating Osgoode from the municipality of North Dundas. That boundary runs west in a straight line before turning north separating Osgoode from the municipality of North Grenville. This is another straight line, running north until the Rideau River near Kemptville. The boundary follows the river upstream until almost reaching Merrickville. The boundary then runs in a northwest direction in a straight line with a number of jogs. It separates the municipalities of Montague, Beckwith and Mississippi Mills from the former townships of Marlborough, Goulbourn, Huntley and Fitzroy.

Topography

The highest point in Ottawa is 166 m (545 ft) above sea level, and is located 2.6 km (1.6 mi) SSE of Manion Corners (45°14′05″N 76°03′03″W).[2] The lowest point in the city is the Ottawa River, at 44 m (144 ft) above sea level.

Highest points by ward

Map of Ottawa showing urban area, highways, waterways, and historic townships
More information Ward, Highest point ...
WardHighest pointElevation (approx.)
West Carleton-March Ward2.6 km (1.6 mi) SSE of Manion Corners166 m (545 ft)
Rideau-Jock Ward8 km (5.0 mi) N of Munster on Jinkinson Road153 m (502 ft)
Kanata South WardGlen Cairn Reservoir131 m (430 ft)
College WardKhymer Court129 m (423 ft)
Stittsville WardRockson Crescent128 m (420 ft)
Kanata North WardHuntsville Drive126 m (413 ft)
Osgoode Ward1 km (0.62 mi) SE of Bank Street at Rideau Road120 m (390 ft)
Cumberland WardCumberland Ridge Drive120 m (390 ft)
Barrhaven WardCedarview Road120 m (390 ft)
Gloucester-Southgate WardTom Roberts Avenue119 m (390 ft)
Knoxdale-Merivale WardCedarview Road at Cedarhill Drive115 m (377 ft)
River WardCarlington Hill115 m (377 ft)
Bay WardWesley Clover Parks114 m (374 ft)
Gloucester-South Nepean WardOsgoode Link Pathway at High Road114 m (374 ft)
Innes Ward200 m (660 ft) WSW of Forest Ridge Pumping Station114 m (374 ft)
Beacon Hill-Cyrville WardQuarry Park113 m (371 ft)
Rideau-Rockcliffe WardFoxview Place106 m (348 ft)
Alta Vista WardAlta Vista Drive at Randall Avenue102 m (335 ft)
Capital WardBank Street at Alta Vista Drive96 m (315 ft)
Orléans WardClearcrest Crescent93 m (305 ft)
Kitchissippi WardMaitland Avenue Bridge89 m (292 ft)
Somerset WardParliament Hill86 m (282 ft)
Rideau-Vanier WardRichelieu Park75 m (246 ft)
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Geology

Stromatolite strata near Champlain Bridge
Mer Bleue bog
Burnt Lands Alvar

Many features of geologic interest are found in Ottawa.[3]

More information Site, Feature ...
SiteFeature
W. Erskine Johnston Public School Glacially sculpted Precambrian gneiss outcrops
Kanata Centrum Shopping CentreSandstone and dolomite outcrops
Stony Swamp Conservation AreaCambrian-Ordovician sandstone strata
Champlain BridgeStromatolite fossils
Westboro BeachStromatolite, orthocone and trace fossils
Transitway at Roosevelt AvenueStromatolite fossils
Tunney's PastureCross-section of the Gloucester Fault
Geological Survey of CanadaFossiliferous limestone outcrop
Hog's Back FallsOrdovician sedimentary rocks and the Gloucester Fault
Mer Bleue BogBoreal peatland
Victoria IslandDune bedforms and fossiliferous limestone
Lady Grey DriveOrdovician limestone deposits
Pinhey's PointGlacial erratics
Petrie IslandSedimentary shoreline with imported Ordovician blocks
Carp HillsOutcrops of the Canadian Shield
Pinhey Sand DunesDunes from an ancient shoreline of the Champlain Sea
Cardinal Creek KarstPaleozoic karst
Burnt Lands Alvar Limestone alvar
Colonel By Valley Shallow valley that descends into the Ottawa River
Nanny Goat Hill Steep limestone escarpment
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Climate

Classification

More information Climatic scheme, Initials ...
Ottawa Climate according to major climate systems
Climatic scheme Initials Description
Köppen system[4][5] Dfb Warm-summer humid continental climate
Trewartha system[6] Dcb Continental climate
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Recent data

Central Experimental Farm

Quick facts Ottawa Central Experimental Farm, Climate chart (explanation) ...
Ottawa Central Experimental Farm
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
65
 
 
−5
−14
 
 
52
 
 
−3
−13
 
 
62
 
 
3
−7
 
 
81
 
 
11
1
 
 
80
 
 
19
8
 
 
95
 
 
24
13
 
 
92
 
 
27
16
 
 
87
 
 
26
15
 
 
87
 
 
21
10
 
 
90
 
 
13
4
 
 
72
 
 
6
−2
 
 
74
 
 
−2
−9
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: Environment Canada[7]
Imperial conversion
JFMAMJJASOND
 
 
2.6
 
 
23
7
 
 
2.1
 
 
26
9
 
 
2.4
 
 
37
20
 
 
3.2
 
 
52
34
 
 
3.2
 
 
67
46
 
 
3.7
 
 
76
56
 
 
3.6
 
 
80
60
 
 
3.4
 
 
78
58
 
 
3.4
 
 
70
50
 
 
3.6
 
 
56
39
 
 
2.8
 
 
42
29
 
 
2.9
 
 
29
16
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
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Ottawa Central Experimental Farm maximum records:[8][9]

  • Record high temperature of 37.8 °C (100.0 °F) recorded on August 14, 1944
  • Record high daily minimum of 24.8 °C (76.6 °F) recorded on August 9, 2001
  • Record high dew point of 28.1 °C (82.6 °F) recorded on August 6, 2001
  • Most humid month with a average monthly dew point of 18.8 °C (65.8 °F) recorded during July 2006
  • Warmest month with a average monthly mean temperature of 24.9 °C (76.8 °F) recorded during July 1921
    • Warmest monthly average daily maximum of 31.4 °C (88.5 °F) recorded during July 1921
    • Warmest monthly average daily minimum of 18.5 °C (65.3 °F) recorded during July 1921
    • July 2020 saw no daily maximum temperature below 26.0 °C (78.8 °F)
    • July 2020 saw no temperature below 14.0 °C (57.2 °F)
    • August 2015 saw no dew point below 8.9 °C (48.0 °F)

The lowest yearly maximum dew point is 22.0 °C (71.6 °F) recorded in 2014.[8][9] The lowest yearly maximum daily minimum temperature is 18.9 °C (66.0 °F) recorded in 1886.[8][9] The lowest yearly maximum temperature is 29.4 °C (84.9 °F) recorded in 1883, the only year where summer did not exceed 30.0 °C (86.0 °F) in Ottawa.[10]

The average yearly maximum dew point is 24.0 °C (75.2 °F) and the average yearly maximum daily minimum temperature is 22.5 °C (72.5 °F).[8][9]

More information Month, Jan ...
Climate data for Ottawa (Central Experimental Farm), 1991–2020 normals, extremes 1872–present[a][11]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high humidex 12.9 12.0 28.4 35.3 39.7 44.1 45.7 49.9 41.6 36.1 24.3 18.3 49.9
Record high °C (°F) 15.6
(60.1)		 16.0
(60.8)		 26.7
(80.1)		 31.2
(88.2)		 35.2
(95.4)		 36.7
(98.1)		 37.8
(100.0)		 37.8
(100.0)		 36.7
(98.1)		 31.0
(87.8)		 24.0
(75.2)		 17.2
(63.0)		 37.8
(100.0)
Mean maximum °C (°F) 6.8
(44.2)		 6.8
(44.2)		 13.6
(56.5)		 24.1
(75.4)		 29.8
(85.6)		 32.1
(89.8)		 32.4
(90.3)		 32.1
(89.8)		 29.7
(85.5)		 23.9
(75.0)		 17.0
(62.6)		 9.3
(48.7)		 33.7
(92.7)
Mean daily maximum °C (°F) −5.2
(22.6)		 −3.3
(26.1)		 2.5
(36.5)		 11.2
(52.2)		 19.4
(66.9)		 24.2
(75.6)		 26.7
(80.1)		 25.6
(78.1)		 21.1
(70.0)		 13.3
(55.9)		 5.8
(42.4)		 −1.5
(29.3)		 11.7
(53.1)
Daily mean °C (°F) −9.6
(14.7)		 −8.1
(17.4)		 −2.2
(28.0)		 6.2
(43.2)		 13.8
(56.8)		 18.8
(65.8)		 21.3
(70.3)		 20.1
(68.2)		 15.6
(60.1)		 8.8
(47.8)		 2.0
(35.6)		 −5.1
(22.8)		 6.8
(44.2)
Mean daily minimum °C (°F) −14.0
(6.8)		 −12.9
(8.8)		 −6.9
(19.6)		 1.1
(34.0)		 8.0
(46.4)		 13.3
(55.9)		 15.8
(60.4)		 14.6
(58.3)		 10.1
(50.2)		 4.1
(39.4)		 −1.8
(28.8)		 −8.7
(16.3)		 1.9
(35.4)
Mean minimum °C (°F) −26.7
(−16.1)		 −24.1
(−11.4)		 −19.6
(−3.3)		 −7.0
(19.4)		 0.8
(33.4)		 6.3
(43.3)		 10.1
(50.2)		 8.0
(46.4)		 1.9
(35.4)		 −3.5
(25.7)		 −11.2
(11.8)		 −21.7
(−7.1)		 −27.8
(−18.0)
Record low °C (°F) −37.8
(−36.0)		 −38.3
(−36.9)		 −36.7
(−34.1)		 −20.6
(−5.1)		 −7.2
(19.0)		 0.0
(32.0)		 3.3
(37.9)		 1.1
(34.0)		 −4.4
(24.1)		 −12.8
(9.0)		 −30.6
(−23.1)		 −38.9
(−38.0)		 −38.9
(−38.0)
Record low wind chill −40.6 −42.8 −40.1 −20.8 −8.1 0.0 0.0 0.0 −1.0 −9.6 −25.6 −41.3 −42.8
Average precipitation mm (inches) 65.2
(2.57)		 52.4
(2.06)		 61.6
(2.43)		 81.3
(3.20)		 80.1
(3.15)		 95.1
(3.74)		 92.3
(3.63)		 87.4
(3.44)		 87.0
(3.43)		 90.2
(3.55)		 72.0
(2.83)		 73.6
(2.90)		 938.1
(36.93)
Average rainfall mm (inches) 27.0
(1.06)		 17.0
(0.67)		 32.5
(1.28)		 72.2
(2.84)		 80.0
(3.15)		 95.1
(3.74)		 92.3
(3.63)		 87.4
(3.44)		 87.0
(3.43)		 88.6
(3.49)		 57.1
(2.25)		 35.3
(1.39)		 771.5
(30.37)
Average snowfall cm (inches) 44.5
(17.5)		 41.0
(16.1)		 30.9
(12.2)		 7.5
(3.0)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 1.7
(0.7)		 16.1
(6.3)		 42.7
(16.8)		 184.5
(72.6)
Average extreme snow depth cm (inches) 17
(6.7)		 25
(9.8)		 20
(7.9)		 2
(0.8)		 0
(0)		 0
(0)		 0
(0)		 0
(0)		 0
(0)		 0
(0)		 1
(0.4)		 8
(3.1)		 6
(2.4)
Average precipitation days (≥ 0.2 mm) 15.2 12.0 11.3 12.5 13.5 12.9 12.2 11.5 11.9 14.5 13.9 15.6 157.0
Average rainy days (≥ 0.2 mm) 4.5 3.1 5.6 11.1 13.5 12.9 12.2 11.5 11.9 14.3 10.5 6.3 117.4
Average snowy days (≥ 0.2 cm) 13.0 10.1 7.1 2.3 0.07 0.0 0.0 0.0 0.0 0.38 4.6 11.4 48.9
Average relative humidity (%) (at 15:00 LST) 70.6 63.5 57.6 51.2 51.0 55.1 54.3 55.7 58.1 63.9 68.1 75.5 60.4
Average dew point °C (°F) −12.2
(10.0)		 −11.8
(10.8)		 −7.5
(18.5)		 −1.1
(30.0)		 6.4
(43.5)		 12.5
(54.5)		 15.4
(59.7)		 14.8
(58.6)		 11.4
(52.5)		 4.7
(40.5)		 −1.4
(29.5)		 −7.8
(18.0)		 2.0
(35.6)
Mean monthly sunshine hours 99.3 131.3 167.1 189.8 229.8 254.2 279.0 249.3 177.6 139.4 84.3 82.6 2,083.7
Percentage possible sunshine 35.0 44.9 45.3 46.9 49.9 54.3 58.9 57.1 47.1 41.0 29.4 30.3 45.0
Source: Environment and Climate Change Canada (sun 1981–2010)[7][12][13][9](dewpoint normals 2000-2020, dewpoint records 2000-present)[8]
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Ottawa International Airport

Quick facts Ottawa International Airport, Climate chart (explanation) ...
Ottawa International Airport
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
70
 
 
−6
−14
 
 
50
 
 
−4
−13
 
 
66
 
 
2
−7
 
 
81
 
 
11
1
 
 
75
 
 
20
8
 
 
97
 
 
24
13
 
 
89
 
 
27
15
 
 
79
 
 
26
14
 
 
90
 
 
21
10
 
 
87
 
 
13
3
 
 
74
 
 
6
−2
 
 
72
 
 
−2
−10
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: Environment Canada[14]
Imperial conversion
JFMAMJJASOND
 
 
2.8
 
 
22
6
 
 
1.9
 
 
26
8
 
 
2.6
 
 
36
19
 
 
3.2
 
 
52
33
 
 
2.9
 
 
67
46
 
 
3.8
 
 
76
55
 
 
3.5
 
 
81
60
 
 
3.1
 
 
78
58
 
 
3.5
 
 
70
49
 
 
3.4
 
 
55
38
 
 
2.9
 
 
42
28
 
 
2.9
 
 
29
15
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
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Ottawa Airport maximum records:[10]

  • Record high temperature of 37.8 °C (100.0 °F) recorded on August 14, 1944
  • Record high daily minimum of 25.0 °C (77.0 °F) recorded on July 9, 1955
  • Record high dew point of 27.0 °C (80.6 °F) recorded on June 24, 2025
  • Most humid month with a average monthly dew point of 17.6 °C (63.7 °F) recorded during July 2024
  • Warmest month with a average monthly mean temperature of 23.8 °C (74.8 °F) recorded during July 2020
    • Warmest monthly average daily maximum of 30.5 °C (86.9 °F) recorded during July 2020
    • Warmest monthly average daily minimum of 17.4 °C (63.3 °F) recorded during July 2020
    • July 2020 saw no daily maximum temperature below 26.4 °C (79.5 °F)
    • July 2020 saw no temperature below 13.7 °C (56.7 °F)
    • August 2015 saw no dew point below 9.1 °C (48.4 °F)

The lowest yearly maximum dew point is 20.6 °C (69.1 °F) recorded in 1976; the lowest yearly maximum daily minimum temperature is 18.9 °C (66.0 °F) recorded in 1976; and the lowest yearly maximum temperature is 30.2 °C (86.4 °F) recorded in 2000.[10]

The average yearly maximum dew point is 23.7 °C (74.7 °F) and the average yearly maximum daily minimum temperature is 21.5 °C (70.7 °F).[10]

More information Climate data for Ottawa International Airport, 1991–2020 normals, extremes 1938–present, Month ...
Climate data for Ottawa International Airport, 1991–2020 normals, extremes 1938–present[11]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high humidex 13.9 15.1 30.0 35.1 41.8 46.5 47.2 47.0 42.5 33.9 26.1 18.4 47.2
Record high °C (°F) 12.9
(55.2)		 15.7
(60.3)		 27.4
(81.3)		 31.1
(88.0)		 35.8
(96.4)		 36.1
(97.0)		 36.9
(98.4)		 37.8
(100.0)		 35.1
(95.2)		 30.9
(87.6)		 23.9
(75.0)		 17.9
(64.2)		 37.8
(100.0)
Mean maximum °C (°F) 6.8
(44.2)		 6.5
(43.7)		 13.8
(56.8)		 24.0
(75.2)		 30.1
(86.2)		 32.3
(90.1)		 32.6
(90.7)		 32.2
(90.0)		 29.7
(85.5)		 23.8
(74.8)		 16.9
(62.4)		 9.3
(48.7)		 34.0
(93.2)
Mean daily maximum °C (°F) −5.5
(22.1)		 −3.6
(25.5)		 2.4
(36.3)		 11.3
(52.3)		 19.6
(67.3)		 24.4
(75.9)		 27.0
(80.6)		 25.8
(78.4)		 21.0
(69.8)		 13.0
(55.4)		 5.8
(42.4)		 −1.9
(28.6)		 11.6
(52.9)
Daily mean °C (°F) −10.0
(14.0)		 −8.5
(16.7)		 −2.4
(27.7)		 5.9
(42.6)		 13.6
(56.5)		 18.7
(65.7)		 21.2
(70.2)		 20.1
(68.2)		 15.3
(59.5)		 8.2
(46.8)		 1.7
(35.1)		 −5.8
(21.6)		 6.5
(43.7)
Mean daily minimum °C (°F) −14.3
(6.3)		 −13.2
(8.2)		 −7.1
(19.2)		 0.5
(32.9)		 7.5
(45.5)		 12.9
(55.2)		 15.4
(59.7)		 14.3
(57.7)		 9.6
(49.3)		 3.4
(38.1)		 −2.4
(27.7)		 −9.6
(14.7)		 1.4
(34.5)
Mean minimum °C (°F) −26.8
(−16.2)		 −23.6
(−10.5)		 −19.1
(−2.4)		 −6.9
(19.6)		 0.1
(32.2)		 5.7
(42.3)		 10.3
(50.5)		 8.7
(47.7)		 2.1
(35.8)		 −3.8
(25.2)		 −11.7
(10.9)		 −21.7
(−7.1)		 −27.7
(−17.9)
Record low °C (°F) −35.6
(−32.1)		 −36.1
(−33.0)		 −30.6
(−23.1)		 −16.7
(1.9)		 −5.6
(21.9)		 −0.1
(31.8)		 5.0
(41.0)		 2.6
(36.7)		 −3.0
(26.6)		 −8.0
(17.6)		 −21.7
(−7.1)		 −34.4
(−29.9)		 −36.1
(−33.0)
Record low wind chill −47.8 −47.6 −42.7 −26.3 −10.9 0.0 0.0 0.0 −6.4 −13.3 −29.5 −44.6 −47.8
Average precipitation mm (inches) 70.4
(2.77)		 49.5
(1.95)		 66.3
(2.61)		 81.3
(3.20)		 74.8
(2.94)		 96.8
(3.81)		 88.5
(3.48)		 79.0
(3.11)		 89.6
(3.53)		 87.4
(3.44)		 73.9
(2.91)		 72.4
(2.85)		 929.8
(36.61)
Average rainfall mm (inches) 29.3
(1.15)		 14.5
(0.57)		 34.6
(1.36)		 69.6
(2.74)		 74.5
(2.93)		 96.8
(3.81)		 88.5
(3.48)		 79.0
(3.11)		 90.6
(3.57)		 84.7
(3.33)		 60.5
(2.38)		 34.7
(1.37)		 757.2
(29.81)
Average snowfall cm (inches) 59.2
(23.3)		 48.5
(19.1)		 38.8
(15.3)		 12.2
(4.8)		 0.2
(0.1)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 2.7
(1.1)		 20.7
(8.1)		 49.6
(19.5)		 231.9
(91.3)
Average precipitation days (≥ 0.2 mm) 16.7 13.0 12.6 12.1 13.4 13.9 12.1 11.2 12.4 14.1 14.4 16.7 162.7
Average rainy days (≥ 0.2 mm) 4.9 3.7 6.8 11.0 13.4 13.9 12.1 11.2 12.3 13.6 10.5 6.6 120.0
Average snowy days (≥ 0.2 cm) 16.4 12.9 8.6 3.2 0.13 0.0 0.0 0.0 0.0 0.87 6.5 13.9 62.3
Average relative humidity (%) (at 15:00) 68.4 62.0 57.0 49.5 49.5 53.5 54.2 55.3 58.4 61.6 66.9 72.3 59.1
Average dew point °C (°F) −13.5
(7.7)		 −12.7
(9.1)		 −8.0
(17.6)		 −1.9
(28.6)		 5.9
(42.6)		 12.1
(53.8)		 14.9
(58.8)		 14.4
(57.9)		 10.7
(51.3)		 4.0
(39.2)		 −2.3
(27.9)		 −8.6
(16.5)		 1.3
(34.3)
Mean monthly sunshine hours 122.4 114.1 168.5 187.5 210.5 274.0 301.4 231.9 211.5 148.8 92.4 68.8 2,131.7
Percentage possible sunshine 43.1 39.0 45.7 46.3 45.7 58.6 63.7 53.1 56.1 43.7 32.2 25.2 46.0
Source 1: Environment Canada (sunshine 1981–2010)[14][15][16][17][18]
Source 2: weatherstats.ca (for dewpoint and monthly/yearly average absolute maximum/minimum temperature)[10]
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Notes

  1. [a]
    Extreme high and low temperatures in the table below were recorded at Ottawa from March 1872 to October 1889 and at Ottawa CDA from November 1889 to present.

Historical data

More information Climate data for Ottawa (Central Experimental Farm), elevation: 79.2 m (260 ft), 1981–2010 normals, Month ...
Climate data for Ottawa (Central Experimental Farm), elevation: 79.2 m (260 ft), 1981–2010 normals
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °C (°F) −5.8
(21.6)		 −3.1
(26.4)		 2.4
(36.3)		 11.4
(52.5)		 19.0
(66.2)		 24.1
(75.4)		 26.6
(79.9)		 25.4
(77.7)		 20.5
(68.9)		 12.8
(55.0)		 5.5
(41.9)		 −2.0
(28.4)		 11.4
(52.5)
Daily mean °C (°F) −10.2
(13.6)		 −7.9
(17.8)		 −2.2
(28.0)		 6.5
(43.7)		 13.5
(56.3)		 18.7
(65.7)		 21.2
(70.2)		 19.9
(67.8)		 15.3
(59.5)		 8.4
(47.1)		 2.0
(35.6)		 −5.6
(21.9)		 6.6
(43.9)
Mean daily minimum °C (°F) −14.4
(6.1)		 −12.5
(9.5)		 −6.8
(19.8)		 1.5
(34.7)		 8.0
(46.4)		 13.3
(55.9)		 15.7
(60.3)		 14.5
(58.1)		 10.1
(50.2)		 4.0
(39.2)		 −1.5
(29.3)		 −9.2
(15.4)		 1.9
(35.4)
Average precipitation mm (inches) 62.9
(2.48)		 49.7
(1.96)		 57.5
(2.26)		 71.1
(2.80)		 86.6
(3.41)		 92.7
(3.65)		 84.4
(3.32)		 83.8
(3.30)		 92.7
(3.65)		 85.9
(3.38)		 82.7
(3.26)		 69.5
(2.74)		 919.5
(36.20)
Average rainfall mm (inches) 23.0
(0.91)		 17.9
(0.70)		 28.8
(1.13)		 63.2
(2.49)		 86.6
(3.41)		 92.7
(3.65)		 84.4
(3.32)		 83.8
(3.30)		 92.7
(3.65)		 83.1
(3.27)		 67.5
(2.66)		 31.9
(1.26)		 755.5
(29.74)
Average snowfall cm (inches) 44.3
(17.4)		 34.7
(13.7)		 29.1
(11.5)		 7.2
(2.8)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 2.9
(1.1)		 16.0
(6.3)		 41.3
(16.3)		 175.4
(69.1)
Average precipitation days (≥ 0.2 mm) 16.0 11.7 11.5 13.2 14.5 12.4 11.6 11.2 12.9 14.9 15.2 15.6 160.7
Average rainy days (≥ 0.2 mm) 3.7 3.5 5.5 11.5 14.4 12.4 11.6 11.2 12.9 14.6 11.6 5.5 118.3
Average snowy days (≥ 0.2 cm) 14.1 9.7 7.4 2.7 0.08 0.0 0.0 0.0 0.0 0.81 5.1 12.2 52.0
Mean monthly sunshine hours 99.3 131.3 167.1 189.8 229.8 254.2 279.0 249.3 177.6 139.4 84.3 82.6 2,083.7
Percentage possible sunshine 35.0 44.9 45.3 46.9 49.9 54.3 58.9 57.1 47.1 41.0 29.4 30.3 45.0
Source: Environment Canada[19][20][21][22][23][24][25][26][27] and Weather Atlas[28]
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More information Climate data for Ottawa (Central Experimental Farm), elevation: 79 m (259 ft), 1961-1990 normals, Month ...
Climate data for Ottawa (Central Experimental Farm), elevation: 79 m (259 ft), 1961-1990 normals
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °C (°F) −6.4
(20.5)		 −4.5
(23.9)		 1.8
(35.2)		 10.8
(51.4)		 18.6
(65.5)		 23.6
(74.5)		 26.4
(79.5)		 24.7
(76.5)		 19.7
(67.5)		 12.8
(55.0)		 4.8
(40.6)		 −3.6
(25.5)		 10.7
(51.3)
Daily mean °C (°F) −10.7
(12.7)		 −9.2
(15.4)		 −2.6
(27.3)		 5.9
(42.6)		 13.0
(55.4)		 18.1
(64.6)		 20.8
(69.4)		 19.4
(66.9)		 14.7
(58.5)		 8.3
(46.9)		 1.5
(34.7)		 −7.2
(19.0)		 6.0
(42.8)
Mean daily minimum °C (°F) −15.1
(4.8)		 −14.0
(6.8)		 −7.1
(19.2)		 0.9
(33.6)		 7.3
(45.1)		 12.5
(54.5)		 15.3
(59.5)		 14.1
(57.4)		 9.6
(49.3)		 3.8
(38.8)		 −1.9
(28.6)		 −11.0
(12.2)		 1.2
(34.2)
Average precipitation mm (inches) 50.8
(2.00)		 49.7
(1.96)		 56.6
(2.23)		 64.8
(2.55)		 76.8
(3.02)		 84.3
(3.32)		 86.5
(3.41)		 87.8
(3.46)		 83.6
(3.29)		 74.7
(2.94)		 81.0
(3.19)		 72.9
(2.87)		 869.5
(34.24)
Average rainfall mm (inches) 14.1
(0.56)		 14.7
(0.58)		 30.0
(1.18)		 57.8
(2.28)		 76.2
(3.00)		 84.3
(3.32)		 86.5
(3.41)		 87.8
(3.46)		 83.6
(3.29)		 71.8
(2.83)		 64.1
(2.52)		 29.5
(1.16)		 700.4
(27.59)
Average snowfall cm (inches) 46.1
(18.1)		 41.0
(16.1)		 27.2
(10.7)		 6.7
(2.6)		 0.6
(0.2)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 2.9
(1.1)		 19.1
(7.5)		 53.9
(21.2)		 197.5
(77.5)
Average precipitation days (≥ 0.2 mm) 15 12 12 12 13 13 12 12 13 13 15 16 158
Average rainy days (≥ 0.2 mm) 3 3 6 11 13 13 12 12 13 13 11 5 115
Average snowy days (≥ 0.2 cm) 14 11 7 2 trace 0 0 0 0 trace 5 14 53
Mean monthly sunshine hours 103.4 129.2 158.7 188.1 232.5 253.0 279.0 240.5 170.0 137.9 81.9 80.1 2,054.3
Source: Environment Canada[29]
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More information Climate data for Ottawa (Ottawa International Airport), elevation: 114 m (374 ft), 1981–2010 normals, Month ...
Climate data for Ottawa (Ottawa International Airport), elevation: 114 m (374 ft), 1981–2010 normals
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °C (°F) −5.8
(21.6)		 −3.4
(25.9)		 2.5
(36.5)		 11.6
(52.9)		 19.0
(66.2)		 24.1
(75.4)		 26.5
(79.7)		 25.3
(77.5)		 20.4
(68.7)		 12.7
(54.9)		 5.4
(41.7)		 −2.3
(27.9)		 11.3
(52.3)
Daily mean °C (°F) −10.3
(13.5)		 −8.1
(17.4)		 −2.3
(27.9)		 6.3
(43.3)		 13.3
(55.9)		 18.5
(65.3)		 21.0
(69.8)		 19.8
(67.6)		 15.0
(59.0)		 8.0
(46.4)		 1.5
(34.7)		 −6.2
(20.8)		 6.4
(43.5)
Mean daily minimum °C (°F) −14.8
(5.4)		 −12.7
(9.1)		 −7.0
(19.4)		 1.0
(33.8)		 7.5
(45.5)		 12.9
(55.2)		 15.5
(59.9)		 14.3
(57.7)		 9.6
(49.3)		 3.3
(37.9)		 −2.4
(27.7)		 −10.1
(13.8)		 1.4
(34.5)
Average precipitation mm (inches) 65.4
(2.57)		 54.3
(2.14)		 64.4
(2.54)		 74.5
(2.93)		 80.3
(3.16)		 92.8
(3.65)		 91.9
(3.62)		 85.5
(3.37)		 90.1
(3.55)		 86.1
(3.39)		 81.9
(3.22)		 76.4
(3.01)		 943.4
(37.14)
Average rainfall mm (inches) 25.0
(0.98)		 18.7
(0.74)		 31.1
(1.22)		 63.0
(2.48)		 80.1
(3.15)		 92.8
(3.65)		 91.9
(3.62)		 85.5
(3.37)		 90.1
(3.55)		 82.2
(3.24)		 64.5
(2.54)		 33.5
(1.32)		 758.2
(29.85)
Average snowfall cm (inches) 53.9
(21.2)		 43.3
(17.0)		 38.3
(15.1)		 11.3
(4.4)		 0.2
(0.1)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 3.7
(1.5)		 20.2
(8.0)		 52.5
(20.7)		 223.5
(88.0)
Average precipitation days (≥ 0.2 mm) 16.6 13.1 12.7 12.4 13.4 13.2 11.9 11.0 12.3 14.3 15.2 17.4 163.6
Average rainy days (≥ 0.2 mm) 4.4 3.9 6.7 10.9 13.4 13.2 11.9 11.0 12.3 13.7 11.0 6.0 118.4
Average snowy days (≥ 0.2 cm) 16.1 12.1 8.8 3.5 0.17 0.0 0.0 0.0 0.0 1.1 6.8 14.7 63.3
Average relative humidity (%) 67.5 61.3 56.6 50.2 49.9 53.1 53.7 55.0 59.1 61.6 68.1 72.2 59.0
Mean monthly sunshine hours 122.4 114.1 168.5 187.5 210.5 274.0 301.4 231.9 211.5 148.8 92.4 68.8 2,131.7
Percentage possible sunshine 43.1 39.0 45.7 46.3 45.7 58.6 63.7 53.1 56.1 43.7 32.2 25.2 46.0
Source: Environment Canada[30][31][32][33][34][35]
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More information Climate data for Ottawa (Ottawa International Airport), elevation: 116 m (381 ft), 1938-1990 normals, Month ...
Climate data for Ottawa (Ottawa International Airport), elevation: 116 m (381 ft), 1938-1990 normals
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °C (°F) −6.3
(20.7)		 −4.6
(23.7)		 1.8
(35.2)		 10.8
(51.4)		 18.6
(65.5)		 23.6
(74.5)		 26.4
(79.5)		 24.6
(76.3)		 19.6
(67.3)		 12.8
(55.0)		 4.7
(40.5)		 −3.7
(25.3)		 10.7
(51.2)
Daily mean °C (°F) −10.8
(12.6)		 −9.2
(15.4)		 −2.7
(27.1)		 5.6
(42.1)		 12.8
(55.0)		 17.9
(64.2)		 20.8
(69.4)		 19.2
(66.6)		 14.3
(57.7)		 7.9
(46.2)		 1.0
(33.8)		 −7.6
(18.3)		 5.8
(42.4)
Mean daily minimum °C (°F) −15.5
(4.1)		 −14.0
(6.8)		 −7.3
(18.9)		 0.3
(32.5)		 7.1
(44.8)		 12.2
(54.0)		 15.1
(59.2)		 13.7
(56.7)		 8.9
(48.0)		 3.0
(37.4)		 −2.8
(27.0)		 −11.7
(10.9)		 0.8
(33.4)
Average precipitation mm (inches) 58.0
(2.28)		 58.6
(2.31)		 64.8
(2.55)		 69.0
(2.72)		 76.4
(3.01)		 76.9
(3.03)		 88.1
(3.47)		 92.0
(3.62)		 82.9
(3.26)		 74.8
(2.94)		 86.4
(3.40)		 82.5
(3.25)		 910.4
(35.84)
Average rainfall mm (inches) 15.3
(0.60)		 16.4
(0.65)		 32.0
(1.26)		 58.0
(2.28)		 74.8
(2.94)		 76.9
(3.03)		 88.1
(3.47)		 92.0
(3.62)		 82.9
(3.26)		 70.3
(2.77)		 62.5
(2.46)		 32.6
(1.28)		 701.8
(27.62)
Average snowfall cm (inches) 49.6
(19.5)		 45.2
(17.8)		 32.3
(12.7)		 9.1
(3.6)		 1.2
(0.5)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 0.0
(0.0)		 4.1
(1.6)		 24.2
(9.5)		 55.8
(22.0)		 221.5
(87.2)
Average precipitation days (≥ 0.2 mm) 16 13 13 12 13 12 11 11 12 13 16 18 160
Average rainy days (≥ 0.2 mm) 3 3 7 10 12 12 11 11 12 12 11 6 110
Average snowy days (≥ 0.2 cm) 15 12 9 3 trace 0 0 0 0 1 8 16 64
Average relative humidity (%) 71 68 66 61 61 66 67 71 74 73 77 77 69
Source: Environment Canada[36]
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Rivers and creeks

The Mississippi River.
The Rideau River is one of the two main rivers in Ottawa
The Ottawa River outside of Parliament Hill.

Tributaries of the Ottawa River (from east to west):

The Jock River

Tributaries of the Rideau River (from north to south):

Other rivers and creeks within City of Ottawa:

Features of the Ottawa River

Kìwekì Point
Chaudière Falls

(from east to west)

Features of the Rideau River

Rideau Falls

(from north to south)

Waterfalls

Lakes

Brewer Park Pond

Notes

References

External links

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